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   &#160;<span id="projectnumber">2.1.2</span>
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   <div id="projectbrief">Lightweight IP stack</div>
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<div class="header">
  <div class="summary">
<a href="#func-members">Functions</a>  </div>
  <div class="headertitle">
<div class="title">Interface Identification API<div class="ingroups"><a class="el" href="group__api.html">APIs</a> &raquo; <a class="el" href="group__socket.html">Socket API</a></div></div>  </div>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:gac68ad9ef70eb869525e0a1cc818f056b"><td class="memItemLeft" align="right" valign="top">char *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__if__api.html#gac68ad9ef70eb869525e0a1cc818f056b">lwip_if_indextoname</a> (unsigned int ifindex, char *ifname)</td></tr>
<tr class="separator:gac68ad9ef70eb869525e0a1cc818f056b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga76d07962b9d19c3c6f578de780e2c3be"><td class="memItemLeft" align="right" valign="top">unsigned int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__if__api.html#ga76d07962b9d19c3c6f578de780e2c3be">lwip_if_nametoindex</a> (const char *ifname)</td></tr>
<tr class="separator:ga76d07962b9d19c3c6f578de780e2c3be"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<h2 class="groupheader">Function Documentation</h2>
<a id="gac68ad9ef70eb869525e0a1cc818f056b"></a>
<h2 class="memtitle"><span class="permalink"><a href="#gac68ad9ef70eb869525e0a1cc818f056b">&#9670;&nbsp;</a></span>lwip_if_indextoname()</h2>

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<div class="memproto">
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          <td class="memname">char* lwip_if_indextoname </td>
          <td>(</td>
          <td class="paramtype">unsigned int&#160;</td>
          <td class="paramname"><em>ifindex</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">char *&#160;</td>
          <td class="paramname"><em>ifname</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
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<p>Maps an interface index to its corresponding name. </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">ifindex</td><td>interface index </td></tr>
    <tr><td class="paramname">ifname</td><td>shall point to a buffer of at least {IF_NAMESIZE} bytes </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>If ifindex is an interface index, then the function shall return the value supplied in ifname, which points to a buffer now containing the interface name. Otherwise, the function shall return a NULL pointer. </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga76d07962b9d19c3c6f578de780e2c3be">&#9670;&nbsp;</a></span>lwip_if_nametoindex()</h2>

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          <td class="memname">unsigned int lwip_if_nametoindex </td>
          <td>(</td>
          <td class="paramtype">const char *&#160;</td>
          <td class="paramname"><em>ifname</em></td><td>)</td>
          <td></td>
        </tr>
      </table>
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<p>Returs the interface index corresponding to name ifname. </p><dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">ifname</td><td>Interface name </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The corresponding index if ifname is the name of an interface; otherwise, zero. </dd></dl>

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